Link Axes - Siemens SINUMERIK 828D Programming Manual

Other information
15.1 Axes
15.1.11

Link axes

Link axes are axes, which are physically connected to another NCU and whose position is
controlled from this NCU. Link axes can be assigned dynamically to channels of another
NCU. Link axes are non-local axes from the perspective of a specific NCU.
The axis container concept is used for the dynamic modification of the assignment to an
NCU. Axis exchange with
axes.
Further information
Prerequisites
● The participating NCUs, NCU1 and NCU2, must be connected by means of high-speed
● The axis must be configured appropriately by machine data.
● The "Link axis" option must be installed.
Description
The position control is implemented on the NCU on which the axis is physically connected to
the drive. This NCU also contains the associated axis VDI interface. The position setpoints
for link axes are generated on another NCU and communicated via the NCU link.
The link communication must provide the means of interaction between the interpolators and
the position controller or PLC interface. The setpoints calculated by the interpolators must be
transported to the position control loop on the home NCU and, vice versa, the actual values
must be returned from there back to the interpolators.
References:
For more detailed information about link axes see:
Function Manual, Advanced Functions; Multiple Operator Panels and NCUs (B3)
442
communication via the link module.
References:
Configuration Manual, NCU
and from the part program is not available for link
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Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals